According to the chart of phases of marital satisfaction in the text, at which point in the marriage is the level of satisfaction at its peak? at the beginning of the marriage when the children are preschool age when the children are grown to young adults when the couple is retired

According to the chart of phases of marital satisfaction in the text, the point in the marriage is the level of satisfaction at its peak is when the couple is retired.
Building a successful marriage is a challenge. Satisfaction appears to be a correspondence between the expected and the actual of a relationship according to Burgess and Locke.